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Date:      Tue, 27 Jun 2000 21:32:52 -0600
From:      "Jim Whitelaw" <jim@pdsys.com>
To:        "freebsd-isp@freebsd.org" <freebsd-isp@freebsd.org>
Cc:        "Steve Price" <sprice@hiwaay.net>
Subject:   Re: stress testing
Message-ID:  <20000628032353890.AAA236@showcase.pdsys.com@dooley>
In-Reply-To: <20000627141116.C78259@bsd.planetwe.com>

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On Tue, 27 Jun 2000 14:11:16 -0500, Steve Price wrote:

>put together.  I was wondering if anyone had any neat tips/
>tricks (aside from posting a message to Slashdot) that they
>could share with me.

The high-end tools like Segue SilkPerformer or RSW e-Test will run you about
USD$35,000 or so. If that's not in the budget there's a freebie from
Microsoft called WCAT that's not too bad, ZD has one in their benchmark
suite, and there is a pile of open-source and Java tools as well. Do a search
on freshmeat.net for "web stress test" and you'll find a bunch.
http://www.testingstuff.com also has links to a few dozen testing tool
vendors.

What you do with most of them is create some test scripts and then let them
run while varying things like the number of simultaneous requests, timings
between
requests, simulated connection speeds and randomizing terms in database
lookups and so on. Or you'd run them at increasing load levels to get some
benchmark data you can use to spot bottlenecks in the system or use in
conjunction with your traffic logs to tell you when it's time to add more
hardware. 

SilkPerformer lets you record a browser session that you perform manually and
use that as a starting point for an automated script. You then add in various
randomizing elements to try to simulate real-world load. It has software
agents that can be installed on a number of client workstations that all
report their data to a central test controller/server for aggregation and
reporting. 

MSFT's WCAT can import existing log data to determine popular paths through a
site and use that info to create test scripts. 

Some re
links:

http://www.segue.com/html/s_solutions/s_performer/s_performer.htm
http://www.rswsoftware.com/products/index.html
http://msdn.microsoft.com/workshop/server/toolbox/wcat.asp
http://www.zdnet.com/etestinglabs/stories/benchmarks/0,8829,2326243,00.html
http://dir.yahoo.com/Business_and_Economy/Business_to_Business/Computers/Softw

are/Programming_Tools/Testing/



=========================================================================
Jim Whitelaw                                         tel: +1.780.975.1534
jim-at-pdsys-dot-com                                 fax: +1.780.484.9239
Pathways Data Systems Inc.                          http://www.pdsys.com/
=========================================================================
"It is best to assume that the network is filled with malevolent entities
that will send packets designed to have the worst possible effect."
                                                       - F.Baker, RFC1812

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